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Resource ID

13034

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Contributed by

Frederik Wellmann

date (Robin)

1865-11-12/1909-11-01

type of material

A. MS. notebook

description

CSP kept this notebook from 1865 until his death, recording in it (and dating) many of his investigations in their first stages: "Here I write but never after read what I have written for what I write is done in the process of forming a conception." The sheets have been ordered and numbered by Professor Don Roberts, and a page by page index has been provided by him and is kept with the notebook. Among the topics included are: real definition, the categorical syllogism, intension and extension, the logic of relatives, existential graphs, collections, the theory of signs, induction and hypothesis, the history of science, scepticism and common sense, the nature of truth, liberty and necessity.